for foetus

Placenta is the mechanical and physiological connection between foetal and maternal tissues for the nutrition, respiration and excretion of the foetus..

The hormone progesterone is continually required during the entire period of pregnancy. Hence this hormone is aptly referred to as pregnancy hormone. Pregnancy can be classified into 2 main stages: a) Crucial first 3 months (trimester) b) Post trimester During the first three months of pregnancy, t..

Lymphocytes are the main cells of the immune system. They arise from stem cells present in the liver in the foetus and in the bone marrow in the adul..

It is a disease caused by a retrovirus called HIV that can be passed from one person to another chiefly during sexual contact or through sharing of intravenous drug needles and syringes. A pregnant mother who is infected with HIV can pass the infection to the foetus. The infection can als..

>Once the egg is fertilised, ovulation and menstruation do not take place. The fertilised structure, now called the zygote is diploid. It starts dividing and forms a blastocyst, the first stage of an embryo. The blastocyst gets implanted on the uterine walls. It then grows into a foetus. ..

The female reproductive system consists of a pair of ovaries, a pair of oviducts, uterus, vagina and vulva. The main functions of the female reproductive system are to produce eggs, receive the sperms, provide the site for fertilisation, implantation of the growing embryo and development of t..

It develops above the embryo. It consists of the trophoblast inside and mesoderm outside. Between the amnion and the embryo, there is the amniotic cavity filled with the amniotic fluid secreted by the embryo and the amnion. The amnion and the fluid filled amniotic cavity enlarge and nearly surround..

Nutrition Placenta helps to transport nutrients from maternal blood into foetus Respiration It helps in getting oxygen from the maternal blood into the foetus and CO 2 from foetus blood into the maternal blood. Excretion Nitrogenous waste products produced..

Placenta - Placenta is the mechanical and physiological connection between foetal and maternal tissues for the nutrition, respiration and excretion of the foetus. The surface of the blastocyst gives rise to finger - like outgrowths called chorionic villi which penetrate into depressions o..

>Once a sperm enters an egg, the thickening of the outer walls of the egg blocks the entry of other sperms. Once the egg is fertilised, ovulation and menstruation do not take place. The fertilised structure, now called the zygote is diploid. It starts dividing and forms a blastocyst, the first stag..